noun
backmarker
Used in motorsports (e.g., F1, MotoGP) for a competitor running at the back of the field, often at risk of being lapped.
そのドライバーはバックマーカーとしてレースを終えた。
The driver finished the race as a backmarker.
バックマーカーに周回遅れにされるのは屈辱だ。
Being lapped by a backmarker is humiliating.